Since you are a single legal entity with two different commercial brands/activities, Odoo's standard single-company setup only supports one logo and one company name. However, there are a few approaches to handle this:

Option 1 — Multi-Company Setup (Easiest native solution) Create two companies in Odoo — one per brand. Each gets its own logo, commercial name and invoice layout. Users simply switch between companies when creating invoices. Trade-off is managing shared data across both companies.

Option 2 — Two Journals + QWeb Customization Create a separate accounting journal per brand and customize the invoice report to print different logos/names based on the journal selected. Requires a small custom module.

Option 3 — Custom Brand Field on Invoice Add a custom "Brand/Activity" selection field on the invoice and modify the QWeb report to conditionally show the correct logo and name based on that selection. Most flexible option per invoice.